CID 0190 FMI 02 Loss of Engine Speed Signal
产生此代码的情况:
电子控制模块（ECM）可检测以下状况：
- 发动机已经运转了三秒钟，尚未盘车起动。
- 发动机转速（rpm）没有缓降导致主发动机转速 / 正时传感器（曲轴位置）的正时环齿形丢失。
- 正时环齿形在丢失一秒内找回。
- 过去两秒内蓄电池电压高于 9 VDC。
系统响应:
ECM 将会记录此诊断代码。 诊断代码可在显示模块或电子维修工具上查看。 如果没有从主发动机转速 / 正时传感器接收到有效信号，ECM 会缺省为辅助发动机转速 / 正时传感器。
- 发动机缺火
- 发动机停机
注: 只有当主发动机转速 / 正时传感器和辅助发动机转速 / 正时传感器发生故障时，发动机才会停机。
测试步骤 1. 进行以下的诊断步骤: 发动机转速 / 正时传感器电路 - 测试
结果:
- 正常 - 停止
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